The term "most pseudo" refers to something that appears to be authentic or genuine, but is actually fake or false in nature. The antonyms for this word would therefore include terms that convey authenticity or genuineness. These could include words like real, honest, truthful, genuine, authentic, transparent, and bona fide. Alternately, one could use words that refer to a lack of pretense or falsehood, such as direct, straightforward, candid, plain-spoken, frank, or sincere. By using these antonyms, one can express a more accurate and authentic view of something or someone, instead of falling prey to the appearance of authenticity that may be deceiving.